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Joints

Joints. Where 2 or more bones connect. Articulations. Reason for Joints. Connect bones Provide Support Make them secure Allow for movement in most cases Hyoid only bone that doesn’t connect with another bone Anchors tongue. 3 Types of Joints. Classified by how much movement they allow.

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Joints

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  1. Joints Where 2 or more bones connect Articulations

  2. Reason for Joints • Connect bones • Provide Support • Make them secure • Allow for movement in most cases • Hyoid only bone that doesn’t connect with another bone • Anchors tongue

  3. 3 Types of Joints Classified by how much movement they allow

  4. No Movement Synarthroses • Connective fibers grow between the bones • Structurally Strong • Suture Line “show” joint • Skull • Pelvis • Fibrous Joints • Tib / Fib • Radius / Ulna • Teeth

  5. Skull Suture Joint Development

  6. Amphiarthroses Slight Movement • Cartilage Disc connects the bones • Carry a lot of weight • Symphysis pubis joint • Vertebral joints • Allows for varied movement • Absorb force • Discs filled with a gel • Ribs to Sternum

  7. Diarthroses Free Movement • Capable of many types of Movements • Some just one movement (two directions) • Knee - 2 • Some joints capable of many directions • Elbow - 4 • Ankle – 6 • Wrist – 7 • Synovial Joints

  8. Structure of Synovial Joints • Joint Capsule • Fits over the ends of two bones like a sleeve • Ligaments • Connect two bones together • Articular Cartilage • Cushion bone ends • reduce friction • Synovial membrane • Lubricating fluid

  9. Capsule Synovial Membrane Articular Cartilage Ligament External Ligament

  10. Types of Diarthroses • Ball and Socket • Shoulder & Hip • Hinge • Elbow & Fingers • Pivot • Atlas/Axis (C1 & C2) • Radius/Ulna

  11. Types of Diarthroses • Saddle • Carpometacarpal joint of the thumb • Gliding • Superior & inferior articulating surfaces of vertebrae • Ellipsoid / Condyloid • Wrist

  12. Name That Joint

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